canvas.html

<!DOCTYPE html>
<html>
    <head>
        <title>Canvas Performance Test</title>
        <!--
        <script type='text/javascript' 
            src='http://getfirebug.com/releases/lite/1.2/firebug-lite-compressed.js'></script>
        -->
        <script src="../include/util.js"></script>
        <script src="../include/webutil.js"></script>
        <script src="../include/base64.js"></script>
        <script src="../include/display.js"></script>
        <script src="face.png.js"></script>
    </head>
    <body>
        Iterations: <input id='iterations' style='width:50' value="100">&nbsp;

        Width: <input id='width' style='width:50' value="640">&nbsp;
        Height: <input id='height' style='width:50' value="480">&nbsp;

        <input id='startButton' type='button' value='Do Performance Test'
            style='width:150px' onclick="begin();">&nbsp;

        <br><br>

        <b>Canvas</b> (should see three squares and two happy faces):<br>
        <canvas id="canvas" width="200" height="100"
                style="border-style: dotted; border-width: 1px;">
            Canvas not supported.
        </canvas>

        <br>
        Results:<br>
        <textarea id="messages" style="font-size: 9;" cols=80 rows=25></textarea>
    </body>

    <script>
        var msg_cnt = 0;
        var display, start_width = 300, start_height = 100;
        var iterations;

        function message(str) {
            console.log(str);
            cell = $D('messages');
            cell.innerHTML += msg_cnt + ": " + str + "\n";
            cell.scrollTop = cell.scrollHeight;
            msg_cnt += 1;
        }

        function test_functions () {
            var img, x, y, w, h, ctx = display.get_context();
            w = display.get_width();
            h = display.get_height();
            display.fillRect(0, 0, w, h, [240,240,240]);

            display.blitStringImage("data:image/png;base64," + face64, 150, 10);

            var himg = new Image();
            himg.onload = function () {
                ctx.drawImage(himg, 200, 40); };
            himg.src = "face.png";

            /* Test array image data */
            data = [];
            for (y=0; y< 50; y++) {
                for (x=0; x< 50; x++) {
                    data[(y*50 + x)*4 + 0] = 255 - parseInt((255 / 50) * y, 10);
                    data[(y*50 + x)*4 + 1] = parseInt((255 / 50) * y, 10);
                    data[(y*50 + x)*4 + 2] = parseInt((255 / 50) * x, 10);
                    data[(y*50 + x)*4 + 3] = 255;
                }
            }
            display.blitImage(30, 10, 50, 50, data, 0);

            img = display.getTile(5,5,16,16,[0,128,128]);
            display.putTile(img);

            img = display.getTile(90,15,16,16,[0,0,0]);
            display.setSubTile(img, 0,0,16,16,[128,128,0]);
            display.putTile(img);
        }

        function begin () {
            $D('startButton').value = "Running";
            $D('startButton').disabled = true;
            setTimeout(start_delayed, 250);
            iterations = $D('iterations').value;
        }

        function start_delayed () {
            var ret;

            ret = display.set_prefer_js(true);
            if (ret) {
                message("Running test: prefer Javascript ops");
                var time1 = run_test();
                message("prefer Javascript ops: " + time1 + "ms total, " +
                        (time1 / iterations) + "ms per frame");
            } else {
                message("Could not run: prefer Javascript ops");
            }

            display.set_prefer_js(false);
            message("Running test: prefer Canvas ops");
            var time2 = run_test();
            message("prefer Canvas ops: " + time2 + "ms total, " +
                    (time2 / iterations) + "ms per frame");

            if (Util.get_logging() !== 'debug') {
                display.resize(start_width, start_height, true);
                test_functions();
            }
            $D('startButton').disabled = false;
            $D('startButton').value = "Do Performance Test";
        }

        function run_test () {
            var width, height;
            width = $D('width').value;
            height = $D('height').value;
            display.resize(width, height);
            var color, start_time = (new Date()).getTime(), w, h;
            for (var i=0; i < iterations; i++) {
                color = [128, 128, (255 / iterations) * i, 0];
                for (var x=0; x < width; x = x + 16) {
                    for (var y=0; y < height; y = y + 16) {
                        w = Math.min(16, width - x);
                        h = Math.min(16, height - y);
                        var tile = display.getTile(x, y, w, h, color);
                        display.setSubTile(tile, 0, 0, w, h, color);
                        display.putTile(tile);
                    }
                }
            }
            var end_time = (new Date()).getTime();
            return (end_time - start_time);
        }

        window.onload = function() {
            message("in onload");
            $D('iterations').value = 10;
            display = new Display({'target' : $D('canvas')});
            display.resize(start_width, start_height, true);
            message("Canvas initialized");
            test_functions();
        }
    </script>
</html>